CVE-2026-42926— NGINX ngx_http_proxy_v2_module vulnerability
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I. Basic Information for CVE-2026-42926
Vulnerability Information
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Vulnerability Title
NGINX ngx_http_proxy_v2_module vulnerability
Source: NVD (National Vulnerability Database)
Vulnerability Description
When NGINX Open Source is configured to proxy HTTP/2 traffic by setting proxy_http_version to 2, and also uses proxy_set_body, an attacker may be able to inject frame headers and payload bytes to the upstream peer. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
编码错误
Source: NVD (National Vulnerability Database)
Vulnerability Title
F5 NGINX Open Source 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
F5 NGINX Open Source是美国F5公司的一个高性能Web服务器、反向代理服务器、负载均衡器和API网关。 F5 NGINX Open Source存在安全漏洞，该漏洞源于配置代理HTTP/2流量时使用proxy_set_body，可能导致注入帧头部和有效载荷字节。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| F5 | NGINX Open Source | 1.29.4 ~ 1.30.1 | - |
II. Public POCs for CVE-2026-42926
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · F5 · 2026-05-13 · 51 CVEs total
| CVE-2026-41225 | 9.1 CRITICAL | iControl REST vulnerability |
| CVE-2026-41957 | 8.8 HIGH | BIG-IP and BIG-IQ Configuration utility vulnerability |
| CVE-2026-40061 | 8.7 HIGH | iControl REST and tmsh vulnerability |
| CVE-2026-32673 | 8.7 HIGH | BIG-IP scripted monitor vulnerability |
| CVE-2026-34176 | 8.7 HIGH | Knowledge Appliance mode iControl REST vulnerability |
| CVE-2026-42930 | 8.7 HIGH | Appliance mode iControl REST vulnerability |
| CVE-2026-20916 | 8.1 HIGH | BIG-IQ iControl REST vulnerability |
| CVE-2026-42945 | 8.1 HIGH | NGINX ngx_http_rewrite_module vulnerability |
| CVE-2026-41217 | 7.9 HIGH | BIG-IP tmsh vulnerability |
| CVE-2026-40618 | 7.5 HIGH | BIG-IP SSL/TLS vulnerability |
| CVE-2026-42920 | 7.5 HIGH | BIG-IP DTLS Vulnerability |
| CVE-2026-40629 | 7.5 HIGH | BIG-IP SSL/TLS vulnerability |
| CVE-2026-41956 | 7.5 HIGH | BIG-IP TMM Vulnerability |
| CVE-2026-40060 | 7.5 HIGH | BIG-IP Advanced WAF and ASM vulnerability |
| CVE-2026-41218 | 7.5 HIGH | BIG-IP PEM iRules vulnerability |
| CVE-2026-41227 | 7.5 HIGH | BIG-IP HTTP/2 Layer 7 Dos Protection vulnerability |
| CVE-2026-42409 | 7.5 HIGH | BIG-IP HTTP/2 vulnerability |
| CVE-2026-40067 | 7.5 HIGH | BIG-IP APM Vulnerability |
| CVE-2026-39458 | 7.5 HIGH | BIG-IP DNS Cache vulnerability |
| CVE-2026-39455 | 7.5 HIGH | BIG-IP Configuration utility vulnerability |
Showing top 20 of 51 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: NGINX Open Source
Same vendor: F5
Same weakness: CWE-172
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V. Comments for CVE-2026-42926
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